A veritable cloud of squawking birds, black and sinister, seemingly fills the air.

A swarm of ravens is rarely naturally formed rather, on the world of
Aryth, a powerful Legate with the aid of his astirax companion will
gather a flock of ravens to himself for his astirax to possess. Whether
formed naturally or by the actions of a Legate, a swarm of ravens is a
terrible thing. Although they are only animals with animal-level
intelligence, there seems to be a cunning malice that drives such
creatures, separate to the possessing astirax. It is not for nothing
that they are sometimes referred to as, “the Shadow’s eyes”.

COMBAT A raven swarm seeks simply to surround and attack any living
creature that it may encounter, aiming always for the vulnerable (and
tasty) eyes. Distraction (Ex): Any living creature that begins its turn
with a swarm in its square must succeed on a DC 12 Fortitude save or be
nauseated for 1 round. The save DC is Constitution-based. Eye Attack(Ex): An opponent that takes damage from a raven
swarm must make a Reflex save (DC 14; Dex-based) each round or be
blinded for 2d4 rounds from a series of eye attacks. Should a natural 1
be rolled, the opponent's eyes are lost to the swarm's attack which can
only be restored by regenerate or similar.